class Fish {
   int weight = 1;
}
class Lake {
   Fish fish;
   void setFish(Fish s) {
      fish = s;
   }
   void foodFish(int m) {
      fish.weight=fish.weight+m;
   }
}
public class E1 {
   public static void main(String args[]) {
      Fish redFish = new Fish();
      System.out.println(redFish.weight);
      Lake lake = new Lake();
      lake.setFish(redFish);
      lake.foodFish(120);
      System.out.println(redFish.weight);
      System.out.println(lake.fish.weight);
   }
}


